Effects of Fiber Blends and Needling Parameters on Needlepunched Moldable Nonwoven Fabric

Ghosh, Subhas; Chapman, Lisa Parrillo

doi:10.1080/00405000208630553

Cited by 11 publications

(5 citation statements)

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“…In this situation, fabric failure will occur by breaking fibers instead of fiber slippage, and thus higher strength is expected. 29 If the punch density and penetration are increased above optimal values, the properties usually tend to deteriorate owing to the fact that the excessive needling action produces extensive fiber breakage. Thus, the effect of these needling parameters certainly on fabric tensile properties (at a given web weight) causes improvement as a greater degree of entanglement and fiber-locking is caused, but subsequently excessive needle action damages the web structure, which results in inferior fabric characteristics.…”

Section: Methodsmentioning

confidence: 99%

The effect of needle-punched nonwoven fabric thickness on electromagnetic shielding effectiveness

Özen

Sancak

Akalın

2014

Textile Research Journal

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In this study, the effect of nonwoven fabric thickness on electromagnetic shielding effectiveness (EMSE) was investigated and there was found to be a correlation between the thickness of needle-punched nonwoven fabric and EMSE. The production of needle-punched nonwoven fabrics from stainless steel staple fiber in the experimental study was carried out. Stainless steel staple fibers provided by Bekaert were used as a raw material. The webs were formed using a wool-type carding machine. The webs were bonded using needling punching machines. The pre-needled, twice-needled and thrice-needled nonwoven fabrics at three different thicknesses were produced. The experimental studies were carried out using large-scale production machines instead of small-scale laboratory-type machines. EMSE measurements of produced needle-punched nonwoven fabrics, in addition to physical properties such as strength, elongation and thickness, were performed. The coaxial transmission line method specified in ASTM D4935-10 was utilized to test the nonwoven fabrics and the needle-punched nonwoven fabrics were tested in the frequency range from 15 to 3000 MHz. It was understood that needle-punched nonwoven fabric thickness was a very important parameter for EMSE. It was found that as the frequency increases, EMSE values of needle-punched nonwoven fabrics showed continuously increasing tendency by starting from a specific frequency in the frequency range of 15–3000MHz. There were no significant differences between absorption and reflection values of needle-punched nonwoven fabrics produced at different thicknesses. It was found that pre-needle-punched, twice-needled and thrice-needle-punched nonwoven fabrics produced from the conductive stainless steel staple fibers in our study have, respectively, highest EMSE values of 22, 25 and 27 dB between 2100 and 2400 high frequency ranges.

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Section: Methodsmentioning

confidence: 99%

The effect of needle-punched nonwoven fabric thickness on electromagnetic shielding effectiveness

Özen

Sancak

Akalın

2014

Textile Research Journal

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“…12 The effects of blend ratio, needling/punching density and depth of needle penetration on the properties of two layered composite nonwovens were examined by Ghosh and Chapman. 13 The results in this study indicated that the bursting of heated samples increased with an increase in the amount of nylon fiber in the mixture and increase in punching density. Another study carried out on the effect of the mass per unit area, punching density and depth of needle penetration on mechanical properties (including bursting strength) showed that bursting strength initially increases and then after attaining a certain value it decreases with an increase in mass per unit area and also bursting strength decreases with an increase in punching density.…”

Section: Introductionmentioning

confidence: 57%

An investigation on bursting strength of polyester/viscose blended needle-punched nonwovens

Koç

Çinçik

2012

Textile Research Journal

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The aim of this study is to analyze the bursting strength of polyester/viscose blended needle-punched nonwovens. For this purpose, five different blend ratios of polyester/viscose webs were produced, cross-lapped and needled in four different mass per unit areas and three different needling/punching densities. The bursting strength of 60 nonwovens was determined by performing the standard test method; the data obtained from tests were statistically analyzed in Design Expert software. In addition, a mixture process crossed-regression model with two mixture components (polyester and viscose blend ratios) and two process variables (fabric mass per unit area and needling density) was developed to analyze the bursting strength of polyester/viscose blended needled nonwovens. In conclusion, the regression model indicated that the bursting strength of the needle-punched nonwovens initially decreases and then increases with the increase of polyester fiber in the mixture and with the increase in mass per unit area. On the other hand, when the mass per unit area is kept constant, an increase in needling density causes decreases in bursting strength.

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“…Here, short fibers of length 2 mm were used, which made it easy to mix with the powdery template because of the very low fiber-fiber entanglement. 29 The sugar template regulates the pore size and ensures the fiber bonding just at the initial contact points. A significant advantage of using sugar as the template is its nonhazardous nature to cells.…”

Section: Discussionmentioning

confidence: 99%

Three-Dimensional Tissue Scaffolds from Interbonded Poly(ε-Caprolactone) Fibrous Matrices with Controlled Porosity

Tang

Wong

Wang

et al. 2011

Tissue Engineering Part C: Methods

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In this article, we report on the preparation and cell culture performance of a novel fibrous matrix that has an interbonded fiber architecture, excellent pore interconnectivity, and controlled pore size and porosity. The fibrous matrices were prepared by combining melt-bonding of short synthetic fibers with a template leaching technique. The microcomputed tomography and scanning electron microscopy imaging verified that the fibers in the matrix were highly bonded, forming unique isotropic pore architectures. The average pore size and porosity of the fibrous matrices were controlled by the fiber/template ratio. The matrices having the average pore size of 120, 207, 813, and 994 μm, with the respective porosity of 73%, 88%, 96%, and 97%, were investigated. The applicability of the matrix as a three-dimensional (3D) tissue scaffold for cell culture was demonstrated with two cell lines, rat skin fibroblast and Chinese hamster ovary, and the influences of the matrix porosity and surface area on the cell culture performance were examined. Both cell lines grew successfully in the matrices, but they showed different preferences in pore size and porosity. Compared with two-dimensional tissue culture plates, the cell number on 3D fibrous matrices was increased by 97.27% for the Chinese hamster ovary cells and 49.46% for the fibroblasts after 21 days of culture. The fibroblasts in the matrices not only grew along the fiber surface but also bridged among the fibers, which was much different from those on two-dimensional scaffolds. Such an interbonded fibrous matrix may be useful for developing new fiber-based 3D tissue scaffolds for various cell culture applications.

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Effects of Fiber Blends and Needling Parameters on Needlepunched Moldable Nonwoven Fabric

Cited by 11 publications

References 0 publications

The effect of needle-punched nonwoven fabric thickness on electromagnetic shielding effectiveness

The effect of needle-punched nonwoven fabric thickness on electromagnetic shielding effectiveness

An investigation on bursting strength of polyester/viscose blended needle-punched nonwovens

Three-Dimensional Tissue Scaffolds from Interbonded Poly(ε-Caprolactone) Fibrous Matrices with Controlled Porosity

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